Uso do laser no tratamento da hipersensibilidade dentinária

Abstract

INTRODUCTION: Dentin hypersensitivity is a painful condition due to exposed dentinal tubules that is increasingly common that has different types of treatments. Application of fluorides, fluoride varnishes and desensitizing agents have been used over the years as tools to reduce pain due to this condition. Recently, laser has been described for the treatment of dentinal hypersensitivity. The literature affirms that the laser leads to the formation of tertiary dentin, reducing sensitivity. Other authors demonstrate that photobiomodulation can induce an alteration in the potential of the nerve fibers present in the dentinal tubules, which would lead to the need for an increasing nerve stimulus to generate pain. However, several laser parameters are used, which makes it difficult to apply a clinically more effective protocol. AIM: To review the literature on the ideal protocol for the use of laser in the treatment of dentinal hypersensitivity. METHODOLOGY: For the present work, a literature review will be carried out based on international articles available in the

databases: PubMed, Lilacs and SciELO. Clinical trials, cohort studies and case- control studies will be included in the review. Studies published in the last ten

years will also be included. The descriptors used for the search will be in English: dentine hypersensitivity; laser therapies; Nd-YAG lasers; dentin desensitizing agents. RESULTS: of the twenty-one articles selected, nine were analyzed in relation to the protocols and treatments adopted. Low power laser with wavelength 660 nm, 780 nm, 810 nm and 980 nm, showed effective results in relation to decreased sensitivity and pain. Four to six daily applications with red laser showed analgesic effects, and the association of red laser and infrared had significant reductions in dentin hypersensitivity. CONCLUSION: Several studies report on the effectiveness of low-level laser, however, there is no consensus regarding the standard protocol for more reliable and assertive treatments for patients. Clinical studies on the subject should be carried out in order to create stronger scientific evidence on the subject.